Technology / product information

In pop-up desk socket systems, the lid can spring open too quickly, causing unwanted impact noise and shortening the mechanism’s lifespan.
KEM (Thailand) developed a Φ13 mm Rotary Damper specifically designed for embedded desk sockets to control rebound force and impact noise during opening and closing — ensuring safety, durability, and a premium motion feel.


🔷 Key Takeaways
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- Viscous-type rotary damper for pop-up desk socket applications
- Controls lid rebound and reduces closing noise
- Housing made from engineering plastic (POM / PA), flame-retardant certified to GB8410 Class D
- Outer dimensions: Ø13 × 30 mm
- Torque: customizable per specification
- Operating temperature: -30°C to +80°C
- Over 30,000 operational cycles, torque deviation within ±30% after testing


⚙️ Technical Specifications
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This model is a viscous rotary type damper using silicone oil as the damping medium.
The body is made from POM / PA engineering plastic, compliant with GB8410 Class D flame-retardant standard.

- Outer size: Ø13 × 30 mm
- Operating temperature: -30°C to +80°C
- Test speed: 20 r/min
- Durability: Over 30,000 open/close cycles
- Torque deviation after testing: within ±30%

The internal mechanism generates stable rotational resistance, allowing the lid to rise gradually and close gently without slamming.


🧠 Soft Motion Design Technology (Japan)
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KEM applies Japan’s Soft Motion Design technology to deliver consistent, smooth, and quiet lid movement.
This ensures safe, slow motion without sudden bounce or shock, ideal for office and hospitality environments that value quiet, controlled operation.


🧩 Value for OEM Applications
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- Reduces lid rebound force by over 40% compared to spring-only systems
- Extends pop-up mechanism and hinge life
- Prevents impact damage to covers and surface finishes
- Adds premium tactile motion to meeting tables and office furniture
- Suitable for both vertical and horizontal installations


🧪 Quality Assurance & Testing
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Every unit is torque-tested using a Torque Tester (±5%) and subjected to thermal cycle tests to confirm damping stability under temperature variations.
All testing follows Katoh Electrical Machinery Co., Ltd. (Japan) QA standards.

✅ Product data and testing have been verified by the KEM (Thailand) Engineering Team under QA standards established by Katoh Electrical Machinery Co., Ltd. (Japan), a specialist in industrial damper systems and Soft Motion Design engineering [1][2].


📞 Contact KEM (Thailand)
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For customized damping solutions for office furniture, pop-up systems, or OEM products,
contact our engineering team for consultation and specification below.


❓ FAQ
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Q1: Can this damper fit all pop-up desk socket brands?
A: Yes, shaft dimensions can be customized to match each manufacturer’s structure.

Q2: What torque ranges are available?
A: Adjustable between 0.2 – 0.6 N·m depending on lid weight and motion speed.

Q3: What is the temperature resistance range?
A: Tested for stable operation between -30°C and +80°C.


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📘 Glossary (Key Terms)
- Rotary Damper: Device that controls rotational speed using viscous resistance
- Soft Motion Design: Motion control concept for smooth, safe, quiet movement
- Torque (N·m): Rotational resistance measurement
- Thermal Cycle Test: Repeated temperature cycling test to verify damping stability
- Engineering Plastic (POM / PA): Heat- and impact-resistant plastic for mechanical applications

📚 Reference
[1] Katoh Electrical Machinery Co., Ltd. (Japan), QA Standard for Motion Control Components.
[2] KEM (Thailand) Engineering Test Report, 2025.

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🗓️ Updated: 2025-11-07